I've got several Kobold Flashguns from ebay. The D-Ring attachment clip that
was used on Luke's ESB lightsaber is only correct on a true Kobold or Linhof
Flashgun/Droidcaller. I also purchased the wrong Kobold which had that clip
but it was completely flat on the backside where it is attached to the Flashgun.
For an ESB D-ring it should be curved on the backside, that way you can choose
which side you want to be visible as seen on ------- The Parts of Star Wars --------
under Luke ESB lightsaber. Also check the Droidcaller section for the pictures of
a Kobold/Linhof Flashgun in the Image Archive.